[Telemetry] Ensure TraceData.GetTraceFor() always return the object form of the trace
[Telemetry] Ensure TraceData.GetTraceFor() always return the object form of the trace

BUG=catapult:#3119
TBR=charliea@chromium.org,perezju@chromium.org

Review-Url: https://codereview.chromium.org/2646263002

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